Slow-combustion stove.



E. POLLARD. SLOW COMBUSTION STOVE. APPLIOATION FILED JULY 24, 1909.

969, 1 1 7. y Patented Aug. 3o, 1910.

'rus Ncmzls PETERS ca., wnsumcmw. u. c.

EDWIN POLLARD, OF DOUGLAS, ISLE OF MAN.

SLOW-COMBUSTION STOVE.

Specification of Letters Patent.

Patentednug. so, 1910.

Application filed July 24, 1909. Serial No. 509,437.

T o all whom 'it may concern:

Be it known that I, EDWIN POLLARD, a subject of the King of Great Britain and Ireland, and resident of Eagleliiirst, Douglas, Isle of Man, have invented a certain new and useful Improvement in and Relating to Slow-Combustion Stoves, of which the following is a specification.

This invention relates to slow combustion stoves suitable for the consumption of coal, coke and like materials, and the object is to effectually control the rate of consumption of the fuel, to complete 'the combustion of same and to prevent the evolution of smoke, and utilize the hot gases so as to distribute tlie major portion of the lieat given out -by the fuel.

In describing my invention in detail, reference is made to the accompanying sheet of drawings, in which- Figure 1 represents a front elevation of the stove. Fig. 2 is a sectional elevation through line a., b, of Fig. 4. Fig. 3 is a sectional elevation through line c, d, and Fig. 4 is a. sectional plan on the line 4-4, Fig. 2.

In carrying out my invention, a circular or other suitably shaped shell or outer casing 1 is formed, which is connected to a chambered base 2, having a continuous bottom plate covering 2A, the chambered base being adapted to carry a lire grate 3, and sliding ash pan 4.

Resting upon the chambered base 2, and extending above the grate 3 for a suitable distance, is a lining 5 of brick or other refractory material, above which is a metal casing provided with deflector plates, hereinafter referred to.

Fuel is fed through an opening at the top of stove, said opening being provided with a cover 7. Tube connections 8 are made, connecting the top of stove with the chambered base 2 'below the fire grate, each tube being provided with an' opening 9 for the admission of air, the supply of which is regulated by a plate 10, adapted to slide and expose or close the opening as desired.

For the purpose of admitting more air when required to the interior of stove, an opening 11 is made in the top of the stove communicating with the interior, this opening is also provided with a covering plate 12, adapted to close the opening as shown, or to slide and allow air to enter and mix with the heated gases at top of stove.

As before mentioned, above the brick or like lining 5, is a casing forming the upper part of stove interior, the inner plate 6 of casing preferably corresponding with the contour of the inner surface of lining 5 above the fire grate 3. Between said inner plate 6 and exterior shell 1 of stove, is a cavity C divided by vertical deiector plates, in a manner forming two passages from interior of stove to chimney pipe 13.

At one sideof stove casing is a plate 6A, see Figs. 3 and 4, and opposite thereto in line with pipe 13, is another division plate 6B, both these plates extend from the top to bottom of cavity C, thus forming two passages leading to chimney pipe 13, and as will be obvious in order to retain through passages, the intervening deflector plates in each passage must not extend from top to bottom of casing, but be arranged with openings such as in the manner hereinafter described so as to form Ziff-zag passages.

The escaping gases rom fire to chimney pipe 13, rise up through an opening 14 to each side of the deflector plate 6A, the current being thus divided into two, the escaping gases irst passing over the tops of the respective plates 6C, then under plates 6D,

and over plates 6E to chimney pipe 13, as

indicattd by the curved arrows in Fig. 3, the heated gases thus escaping in a zig-zag direction, are caused to pass over a considerable surface for radiation, before entering the chimney.

To the heated gases collected at the top of stove, atmospheric air may be added, on uncovering openings 9, thev air mixing with the hot gases as they are passing downward through the tubular connections 8, to the chambered base `2 below. The smoke and other gases mixed with air conveyed to the chambered base 2, on passing throu h grate 3 and the fire resting thereon are e ectually consumed, thereby generating more heat, and a reduction in the emission of smoke, some of the gases and air after passing through the fire, escape through opening 14, the remainder rising to the top of stove, are again drawn through the tubular connections 8, into chambered base 2.

For the purpose of regulating the consumption of fuel, a damper 17 is placed in vertical tube 16, which is connected with chimney pipe 13. On opening said damper, cold air is admitted, thus reducing the draft through the stove.

The ire lighting and cleaning out door 18,

is by preference provided with a sheet oi mica 19, and on lighting a lire, additional air is admitted by drawing out the sliding ash pan 4, as in ordinary stoves.

On the underside of fire grate 3 is a stud 20, and engaging therewith is the slotted arm 2l of bar 22, suitably supported and provided with a lever 23, on the operation of which, grate 3 is agitated and cleared of ashes, without having occasion to open the stove door, or remove the ash pan.

l/Vhat I claim as my invention is A stove comprising inner and outer casings forming inner and outer chambers, an ash pit below the chambers, fire brick below the outer chamber, said lre brick having a passage therein connecting the inner chamber with the outer ohainber, partition plates dividing the outer chamber into two parts to form two passages from the said passage, defleetor plates in said passages forming zig-zag channels, a smoke outlet pipe connected with said passages and tubes connecting the top of the inner chamber with the ash pit.

In witness whereof, I have hereunto set my hand to this specification in the presence of two witnesses.

EDI/VIN POLLARD. Vitnesses JOHN GILL, IVALTER SIMAN. 

